26971475309917 has 2 divisors, whose sum is σ = 26971475309918. Its totient is φ = 26971475309916.

The previous prime is 26971475309803. The next prime is 26971475309927. The reversal of 26971475309917 is 71990357417962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24371934998436 + 2599540311481 = 4936794^2 + 1612309^2 .

It is a cyclic number.

It is not a de Polignac number, because 26971475309917 - 2⁷ = 26971475309789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26971475309927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13485737654958 + 13485737654959.

It is an arithmetic number, because the mean of its divisors is an integer number (13485737654959).

Almost surely, 2^{26971475309917} is an apocalyptic number.

It is an amenable number.

26971475309917 is a deficient number, since it is larger than the sum of its proper divisors (1).

26971475309917 is an equidigital number, since it uses as much as digits as its factorization.

26971475309917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180033840, while the sum is 70.

The spelling of 26971475309917 in words is "twenty-six trillion, nine hundred seventy-one billion, four hundred seventy-five million, three hundred nine thousand, nine hundred seventeen".